S CORP A EN I FORMES 



45i 



spiny. The myodome is lost ; the post-temporal fixed, the pelvic fins 

 ■close together with one spine and two soft rays, and the anal spineless. 

 Bony plates cover the body. 



Agon-us, Bloch, the 'Pogge,' widely distributed. 



Fio. 460. 

 Chorismodactylus mvZtibarbis, Rich. (After Giinther.) 



20 19 



16 15 | 4 13 



Fig. 470. 



Trigla gurnardus, L. Left-side view of skeleton of head and pectoral girdle. 1, nasal ; 2, 

 •nasal capsule; 3, prefrontal; 4, preopercular ; 5, opercular; 6, pterotic ; 7, subopercular ; 8, 

 supraclavicle ; 9, cleithrum ; 10, scapula; 11, lepidotrichia ; 12, three free specialised lepido- 

 trichia ; 13, radial; 14, coracoid ; 15, subopercular; 16, cleithrum; 17, interopercular ; 18, 

 angular ; 19, articular ; 20, maxilla ; 21, enlarged suborbital ; 22, dentary ; 23, premaxilla. 



C. Family Dactylopteridae. Resembling the preceding family in 

 the complete armature of the head, the subdivision of the dorsal fin, and 

 the fusion of the post-temporal ; but the myodome is lost. The head is 

 .short ; the cephalic cuirass extends far back. The dorsal fin is preceded 



